There's a Ship with a Perpetual Calendar - Apparently.
The RMS Queen Mary, a British passenger liner built in the 1930s, features a wall clock that is set to the wrong time by one hour. This is because the ship's builders couldn't decide whether to account for British Summer Time (BST) or Greenwich Mean Time (GMT). As a result, the clock remains set to BST, even though the ship itself is no longer in service.